28449773448 has 32 divisors (see below), whose sum is σ = 71210904000. Its totient is φ = 9471728448.

The previous prime is 28449773393. The next prime is 28449773449. The reversal of 28449773448 is 84437794482.

It is a junction number, because it is equal to n+sod(n) for n = 28449773391 and 28449773400.

It is not an unprimeable number, because it can be changed into a prime (28449773449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 700423 + ... + 739926.

It is an arithmetic number, because the mean of its divisors is an integer number (2225340750).

Almost surely, 2^28449773448 is an apocalyptic number.

It is an amenable number.

28449773448 is an abundant number, since it is smaller than the sum of its proper divisors (42761130552).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28449773448 is a wasteful number, since it uses less digits than its factorization.

28449773448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1441181 (or 1441177 counting only the distinct ones).

The product of its digits is 43352064, while the sum is 60.

The spelling of 28449773448 in words is "twenty-eight billion, four hundred forty-nine million, seven hundred seventy-three thousand, four hundred forty-eight".